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revert: allow single-pick in the middle of cherry-pick sequence

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After messing up a difficult conflict resolution in the middle of a
cherry-pick sequence, it can be useful to be able to

	git checkout HEAD . && git cherry-pick that-one-commit

to restart the conflict resolution. The current code however errors out
saying that another cherry-pick is already in progress.

Suggested-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2011-12-10 06:59:48 -06:00 committed by Junio C Hamano
parent 7f13334e07
commit 7acaaac275
2 changed files with 38 additions and 0 deletions
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26
builtin/revert.c
View file

@ -1072,6 +1072,12 @@ static int sequencer_continue(struct replay_opts *opts)
return pick_commits(todo_list, opts);
}
static int single_pick(struct commit *cmit, struct replay_opts *opts)
{
setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
return do_pick_commit(cmit, opts);
}
static int pick_revisions(struct replay_opts *opts)
{
struct commit_list *todo_list = NULL;
@ -1096,6 +1102,26 @@ static int pick_revisions(struct replay_opts *opts)
if (opts->subcommand == REPLAY_CONTINUE)
return sequencer_continue(opts);
/*
* If we were called as "git cherry-pick <commit>", just
* cherry-pick/revert it, set CHERRY_PICK_HEAD /
* REVERT_HEAD, and don't touch the sequencer state.
* This means it is possible to cherry-pick in the middle
* of a cherry-pick sequence.
*/
if (opts->revs->cmdline.nr == 1 &&
opts->revs->cmdline.rev->whence == REV_CMD_REV &&
opts->revs->no_walk &&
!opts->revs->cmdline.rev->flags) {
struct commit *cmit;
if (prepare_revision_walk(opts->revs))
die(_("revision walk setup failed"));
cmit = get_revision(opts->revs);
if (!cmit || get_revision(opts->revs))
die("BUG: expected exactly one commit from walk");
return single_pick(cmit, opts);
}
/*
* Start a new cherry-pick/ revert sequence; but
* first, make sure that an existing one isn't in

12
t/t3510-cherry-pick-sequence.sh
View file

@ -50,6 +50,18 @@ test_expect_success 'cherry-pick persists data on failure' '
test_path_is_file .git/sequencer/opts
'
test_expect_success 'cherry-pick mid-cherry-pick-sequence' '
pristine_detach initial &&
test_must_fail git cherry-pick base..anotherpick &&
test_cmp_rev picked CHERRY_PICK_HEAD &&
# "oops, I forgot that these patches rely on the change from base"
git checkout HEAD foo &&
git cherry-pick base &&
git cherry-pick picked &&
git cherry-pick --continue &&
git diff --exit-code anotherpick
'
test_expect_success 'cherry-pick persists opts correctly' '
pristine_detach initial &&
test_must_fail git cherry-pick -s -m 1 --strategy=recursive -X patience -X ours base..anotherpick &&